The ad for the sale, which offers any size mattress for the price of a twin, was removed from the store’s Facebook page Thursday, as hundreds of horrified viewers condemned the tone-deaf video.

The store should have forgotten to make this ad in the first place.

(Miracle Mattress via Twitter)

“I’ve never done business with you before and I will make sure I never do business with you in the future,” wrote Adrianne Zawadski. “How you could even think for one second that anyone would find this funny or non-offensive is beyond me!”

The store apologized Thursday.

(Miracle Mattress via Twitter)

“To all of those who have seen our 9/11 sale. We are very sorry we have offended you. Our intentions were not to hurt anyone at all,” the post read. “Our staff is full of military and some relatives have passed away due to 9/11.”

“Too bad you can’t apologize to the men and woman that died on 9/11, many that I worked with,” wrote Scott Alan. “I’ll be forwarding this to every police and fire agency in your area so they can see what your all about.”

“You’re sorry you offended me? That’s not an apology I accept,” wrote Heather English. “Apologizing for creating it in the first place would be a start. Admitting you were WRONG for creating it is another step. There will never be an appropriate time to mock 9/11, and to do it to promote mattress sales?! Are you kidding me?”

Sunday will be the 15th anniversary of the worst terror attack on American soil.